The Simport Cryovial® family is the most complete line of cryogenic vials available. The polypropylene Composition offers a high level of chemical resistance and allows for storing biological materials at temperatures as low as -196°C. Both the tube and cap are made from the same plastic, which ensures the same expansion coefficient and a lasting seal. Tubes have a white marking area for sample identification and can be color-coded with inserts sold separately. Vials are sterilized by gamma radiation and are packaged in unique tamperproof, resealable, safety-lock bags of 100.